Dynamic mechanical characteristics of NdFeB in electromagnetic brake

作     者：Lei Li Guo-lai Yang Li-qun Wang Lei Li;Guo-lai Yang;Li-qun Wang

作者机构：School of Mechanical EngineeringNanjing University of Science and TechnologyNanjing210094JiangsuChina 

出 版 物：《Defence Technology（防务技术）》 (Defence Technology)

年 卷 期：2023年第19卷第1期

页      面：111-125页

核心收录：

学科分类：082601[工学-武器系统与运用工程] 08[工学] 082603[工学-火炮、自动武器与弹药工程] 0826[工学-兵器科学与技术] 

基　　金：financially supported by the“National Natural Science Foundation of China”[Grant No.52105106] the“China National Postdoctoral Program for Innovative Talents”[Grant No.BX2021126] the“Jiangsu Province Natural Science Foundation”[Grant No.BK20210342] the“Jiangsu Planned Projects for Postdoctoral Research Funds”[Grant No.2021K008A] the“Nanjing Municipal Human Resources and Social Security Bureau”[Grant No.MCA21121] 

主　　题：Electromagnetic brake Sintered NdFeB Damage constitutive Dynamic mechanical characteristics 

摘      要：With the continuous development of artillery,the disadvantages of hydraulic recoil brakes gradually *** the same time,the appearance of high-performance Nd Fe B permanent magnet makes it possible to apply electromagnetic braking technology to recoil *** this paper,prototype tests of a certain artillery were carried out to verify the feasibility of the electromagnetic brake(EMB)and obtain the electromagnetic braking *** to the brittleness of Nd Fe B,in order to eliminate the worry about the safety of EMB,SHPB experiments of Nd Fe B were carried ***,based on the assumption of uniform crack distribution,the law of crack propagation and damage accumulation was described theoretically,and the damage constitutive model suitable for brittle materials was proposed by combining the Zhu-Wang-Tang(ZWT)***,the numerical simulation model of the artillery prototype was established and through calculation,the dynamic mechanical characteristics of Nd Fe B in the prototype were *** calculation results show that the strength of Nd Fe B can meet the requirements of the use in the working *** the perspective of damage factor,the damage value of the permanent magnet on the far right is larger,and the damage value of the inner ring gradually decreases to the outer ring.